When Jose Mourinho's Stamford Bridge homecoming was confirmed in June, almost every bookmaker installed them as firm favourites to lift the Premier League title, with the Portuguese declaring he was now 'the happy one' upon his return.
However, the former Real Madrid boss has found life back in England slightly more difficult than many would have predicted, despite being fifth in the table and only four points from the summit.
Defeats to Everton in the Premier League and Basel in Europe have put a slight blip on the two-time Champions League winner's CV, while his high-profile exclusion of Spanish star Juan Mata has left people rightly bemused.
While many will still consider the Blues the obvious candidates to lift the title come May, they will most certainly need to improve as the season wears on in order to topple sides like Arsenal, Tottenham and Manchester City, while current champions Manchester United will surely be there or thereabouts also despite a poor start.
Mourinho's problem position seems to be up front, where new signing Samuel Eto'o has failed to convince following his summer arrival and Fernando Torres and Demba Ba look no nearer to regaining past form.
The decision to allow Romelu Lukaku to depart on loan also looks increasingly poor as the 20-year-old continues to impress at Everton, having already scored more than any of the current Blues strikeforce this term.
The Portuguese has put his side's slow start down to a change in playing style from that seen under last season's interim boss Rafa Benitez, and insists that it will take some time for the players to adjust to the new system.
Mourinho's pedigree has never been in doubt, having won domestic titles in four different countries since taking the reins at Porto over a decade ago and subsequently leading Chelsea to back-to-back titles in 2005 and 2006 in impressive style.
Chelsea's squad is also incredibly talented and if things click for the Blues, they are sure to be in the mix next May, however they must improve soon or risk being left behind by the Premier League fast-starters.